Avg High
Perth in January
Avg Low
Rain
Daylight
14h
What to expect
Perth is in mid-summer during January, with the season well established by this point. Afternoons often feel hot in direct sun, and a gentle drop-off once the sun goes down. Conditions tend to feel steady, which makes planning simple. Daylight stays generous for longer outdoor plans.
January in context
How it compares to the rest of the year in Perth.
Hottest (avg)
#2 / 12
Wettest (avg)
#10 / 12
Daylight Hours
#2 / 12
Windiest (avg)
#1 / 12
Highest UV
#1 / 12
Most Humid
#12 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 14 h
- UV index (max)
- 10
- Typical sun hours
- 05:26 - 19:24
Rain & Snow
- Total rain
-
- Rainy days
- 3 days
- Cloud cover (avg)
- 22%
Humidity & Wind
- Humidity (avg)
- 51%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for January. Typical high 31.1°C and low 18.2°C.
Typical disruptions in January
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in January.
Heat High impact
Hot days Measures: Hot days (>=30C). Observed about 57% of days (17.7 days/month) in January. Historical risk signal only, not a day-by-day forecast.
17.7 days / month
~57% of days
Why this matters
- Expected days 17.7 days / month
- Probability ~57% of days
- Intensity Up to ~39°C (P95)
Hot days are possible on ~18 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Hot feels-like days Measures: Hot feels-like days (>=32C). Observed about 42% of days (13.0 days/month) in January. Historical risk signal only, not a day-by-day forecast.
13.0 days / month
~42% of days
Why this matters
- Expected days 13.0 days / month
- Probability ~42% of days
- Intensity Up to ~41°C (P95)
Feels-like heat >=32C is possible on ~13 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Very hot feels-like Measures: Very hot feels-like days (>=35C). Observed about 24% of days (7.4 days/month) in January. Historical risk signal only, not a day-by-day forecast.
7.4 days / month
~24% of days
Why this matters
- Expected days 7.4 days / month
- Probability ~24% of days
- Intensity Up to ~41°C (P95)
Very hot feels-like conditions are possible on ~7 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Very hot days Measures: Very hot days (>=35C). Observed about 20% of days (6.3 days/month) in January. Historical risk signal only, not a day-by-day forecast.
6.3 days / month
~20% of days
Why this matters
- Expected days 6.3 days / month
- Probability ~20% of days
- Intensity Up to ~41°C (P95)
Very hot days are possible on ~6 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Wind High impact
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 12% of days (3.7 days/month) in January. Historical risk signal only, not a day-by-day forecast.
3.7 days / month
~12% of days
Why this matters
- Expected days 3.7 days / month
- Probability ~12% of days
- Intensity Up to ~74km/h (P95)
Strong gusts are possible on ~4 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Heat High impact
Heat stress risk Measures: High heat stress days. Observed about 2% of days (0.7 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.7 days / month
~2% of days
Why this matters
- Expected days 0.7 days / month
- Probability ~2% of days
- Intensity Up to ~43°C (P95)
Heat stress is possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Show all disruptions (21 more)
Rain High impact
Rain disruption Measures: Likely rain disruption days. Observed about 2% of days (0.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.6 days / month
~2% of days
Why this matters
- Expected days 0.6 days / month
- Probability ~2% of days
- Intensity Up to ~48mm (P95)
Rain disruption risk appears on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 2% of days (0.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.6 days / month
~2% of days
Why this matters
- Expected days 0.6 days / month
- Probability ~2% of days
- Intensity Up to ~51mm (P95)
Washout conditions are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat High impact
Extreme heat days Measures: Extreme heat days (>=40C). Observed about 2% of days (0.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.6 days / month
~2% of days
Why this matters
- Expected days 0.6 days / month
- Probability ~2% of days
- Intensity Up to ~42°C (P95)
Extreme heat is possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Rain High impact
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 1% of days (0.5 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~1% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~1% of days
- Intensity Up to ~65mm (P95)
Heavy rain is possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind High impact
Stormy conditions Measures: Storm-impact proxy days. Observed about 1% of days (0.2 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~69km/h (P95)
Stormy conditions are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 0.1 days/month in January. Historical risk signal only, not a day-by-day forecast.
0.1 days / month
Probability unavailable
Why this matters
- Expected days 0.1 days / month
- Probability —
- Intensity Up to ~31mm (P95)
Multi-day washout runs are possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat Moderate
Heatwave run Measures: Heatwave runs (>=3 hot days). Observed about 2.6 days/month in January. Historical risk signal only, not a day-by-day forecast.
2.6 days / month
Probability unavailable
Why this matters
- Expected days 2.6 days / month
- Probability —
- Intensity Up to ~40°C (P95)
Heatwave runs are possible on ~3 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat Moderate
Feels-like heatwave Measures: Feels-like heatwave runs (>=3 days). Observed about 1.7 days/month in January. Historical risk signal only, not a day-by-day forecast.
1.7 days / month
Probability unavailable
Why this matters
- Expected days 1.7 days / month
- Probability —
- Intensity Up to ~41°C (P95)
Feels-like heatwave runs are possible on ~2 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Humidity Moderate
Muggy days Measures: Muggy days (dew point >=20C). Observed about 1% of days (0.4 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.4 days / month
~1% of days
Why this matters
- Expected days 0.4 days / month
- Probability ~1% of days
- Intensity Up to ~21°C (P95)
Muggy conditions are possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 92% of days (28.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
28.6 days / month
~92% of days
Why this matters
- Expected days 28.6 days / month
- Probability ~92% of days
- Intensity Up to ~65km/h (P95)
Gusty conditions are possible on ~29 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Heat Minor
Warm nights Measures: Warm nights (min >=22C). Observed about 14% of days (4.4 days/month) in January. Historical risk signal only, not a day-by-day forecast.
4.4 days / month
~14% of days
Why this matters
- Expected days 4.4 days / month
- Probability ~14% of days
- Intensity Up to ~27°C (P95)
Warm nights are possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 13% of days (4.0 days/month) in January. Historical risk signal only, not a day-by-day forecast.
4.0 days / month
~13% of days
Why this matters
- Expected days 4.0 days / month
- Probability ~13% of days
- Intensity Up to ~15mm (P95)
Measurable rain is possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Breezy days Measures: Breezy days (mean wind >=25 km/h). Observed about 12% of days (3.8 days/month) in January. Historical risk signal only, not a day-by-day forecast.
3.8 days / month
~12% of days
Why this matters
- Expected days 3.8 days / month
- Probability ~12% of days
- Intensity Up to ~32km/h (P95)
Breezy conditions are possible on ~4 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 12% of days (3.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
3.6 days / month
~12% of days
Why this matters
- Expected days 3.6 days / month
- Probability ~12% of days
- Intensity Up to ~92% (P95)
Cloudy skies are possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 8% of days (2.4 days/month) in January. Historical risk signal only, not a day-by-day forecast.
2.4 days / month
~8% of days
Why this matters
- Expected days 2.4 days / month
- Probability ~8% of days
- Intensity Up to ~16h (P95)
Several rainy hours are possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Humidity Minor
Humid days Measures: Humid days (dew point >=18C). Observed about 5% of days (1.6 days/month) in January. Historical risk signal only, not a day-by-day forecast.
1.6 days / month
~5% of days
Why this matters
- Expected days 1.6 days / month
- Probability ~5% of days
- Intensity Up to ~21°C (P95)
Humid conditions are possible on ~2 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 4% of days (1.1 days/month) in January. Historical risk signal only, not a day-by-day forecast.
1.1 days / month
~4% of days
Why this matters
- Expected days 1.1 days / month
- Probability ~4% of days
- Intensity Up to ~19h (P95)
Wet-most-of-day conditions are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 4% of days (1.1 days/month) in January. Historical risk signal only, not a day-by-day forecast.
1.1 days / month
~4% of days
Why this matters
- Expected days 1.1 days / month
- Probability ~4% of days
- Intensity Up to ~96% (P95)
Mostly cloudy skies are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Minor
Hot nights Measures: Hot nights (min >=25C). Observed about 3% of days (1.0 days/month) in January. Historical risk signal only, not a day-by-day forecast.
1.0 days / month
~3% of days
Why this matters
- Expected days 1.0 days / month
- Probability ~3% of days
- Intensity Up to ~29°C (P95)
Hot nights are possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 1% of days (0.2 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~87% (P95)
High humidity is possible on ~0 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Humidity Minor
Convective risk Measures: Convective storm risk proxy. Observed about 1% of days (0.2 days/month) in January. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~20°C (P95)
Convective risk signal appears on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Frequently asked questions
Is January a good time to visit Perth?
Typical January days in Perth reach highs of 31°C (88°F) with nights around 19°C (66°F). It usually feels hot by day and mild after dark. It is one of the drier months, which suits outdoor exploring and sightseeing.
What are temperatures like in January?
Daytime temperatures in January typically peak near 31°C (88°F), while nights drop to around 19°C (66°F). Expect hot afternoons and mild evenings.
How much does it rain in January?
Rainfall in January averages 15 mm (0.59 in) across roughly 3 days. Overall it is a mostly dry time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in January?
You can expect about 14 hours of daylight in January. Sunrise is typically around 05:26 and sunset near 19:24. You get long days with comfortable amounts of daylight.
How strong is the sun in January?
UV levels frequently reach very high levels (around 10), so strong sun protection is essential, especially around midday.
Is it windy in January?
In January, average wind speeds are around 20 km/h (12 mph), with gusts on the windiest days reaching about 61 km/h (38 mph). On the ground, it is it is a notably windy place, and strong gusts are fairly common.